Shaping powdered active carbons into monoliths without decreasing mesoporosity by using silica sol as binder

Li, Dawei; Jiaojiao, Zhou; Zhang, Zongbo; Tian, Yuanyu; Qiao, Yu; Li, Junhua; Wen, Liping; Ling, Wei

doi:10.1016/j.matlet.2016.12.095

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…Especially, silica sol is widely used due to the uniform distribution of colloidal particles, good bonding performance and strong thermal stability. [68][69][70] For instance, Li et al [64] added silica sol in the preparation of the V 2 O 5 -WO 3 /TiO 2 monolithic catalysts, and the results exhibited that the addition of silica sol enhanced the specific surface area and mechanical properties of the catalysts. Additionally, J. Lefevere et al [71] investigated the effects of bentonite, silica sol and aluminum phosphate solution as binder on the properties of ZSM-5 zeolite catalysts, and found that bentonite played a significant role in the plasticity of molding materials, which may be related to its good water absorption.…”

Section: The Bindersmentioning

confidence: 99%

“…The strength of the monolithic catalysts will decrease when the content of activated carbon is too high [67,68,69] The toughening agents Enhance the adhesion of the powder particles and enhance the mechanical strength of the catalysts The glass fiber contains a small amount of Na + , Ca 2 + , Mg 2 + and other alkali metals, which occupy the active site on the surface of the catalysts [70,71,72,73,74,75,76] ature was increased continuously to 200 °C at a rate of 2 °C min À 1 , the results found that CuO/CeO 2 nanorods indicated more synergetic effect and were more active (T f = 1500 °C) than nanoparticles (T 100% = 1500 °C).…”

Section: Increase the Uniform Mixing Of Catalysts And Improve The Fluidity And Demoulding Properties Of Catalystsmentioning

confidence: 99%

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Formation and Performance of Monolithic Catalysts for Selective Catalytic Reduction of Nitrogen Oxides: A Critical Review

et al. 2021

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Selective Catalytic Reduction of nitrogen oxides with NH 3 (NH 3 -SCR) is the dominant denitration technology for the treatment of nitrogen oxides produced by thermal power plants. Denitration catalysts are the core of the NH 3 -SCR system, which can be fabricated into shaped forms to obtain necessary mechanical strength for industrial applications. Specifically, the monolithic catalysts are widely used due to its unique structural properties and high conversion rate. Therefore, this review critically summarized the development of the monolithic catalysts forming, and characterized the influence of the different carriers, the various additives and different reaction conditions of forming process for NH 3 -SCR. The purpose of this review is to highlight: (1) the Support effect of the different carriers; (2) the influence of mechanical properties of the various forming additives for the monolithic catalysts; and (3) the physicochemical properties of the monolithic catalysts under the different process conditions and illustrate their relations to catalytic performances. Finally, we hope that this work can give timely technical guidance and valuable insights for the applications of the NH 3 -SCR in the field of NO x control.

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Section: The Bindersmentioning

confidence: 99%

Section: Increase the Uniform Mixing Of Catalysts And Improve The Fluidity And Demoulding Properties Of Catalystsmentioning

confidence: 99%

Formation and Performance of Monolithic Catalysts for Selective Catalytic Reduction of Nitrogen Oxides: A Critical Review

et al. 2021

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“…Common binders used for the loading of catalyst powder include water-based silicone resin, benzene propylene polymer, water glass and silica sol [20,21]. The organic solvents and water glass always lead to the cover of active sites [22], and silica sol always leads to the appearance of surface cracks [23], which further decrease the catalytic activity and life of catalysts. Hence, titanium tetrachloride was used as the binder in this work due to its highly dispersed homogenization and the strong chemical adhesion effect, which are beneficial to the stable loading of TiO 2 powder on the surface of metal substrate.…”

Section: Introductionmentioning

confidence: 99%

Stable Loading of TiO2 Catalysts on the Surface of Metal Substrate for Enhanced Photocatalytic Toluene Oxidation

Xu,

Chen,

Zhao

et al. 2023

Molecules

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To promote the practical application of TiO2 in photocatalytic toluene oxidation, the honeycomb aluminum plates were selected as the metal substrate for the loading of TiO2 powder. Surface-etching treatment was performed and titanium tetrachloride was selected as the binder to strengthen the loading stability. The loading stability and photocatalytic activity of the monolithic catalyst were further investigated, and the optimal surface treatment scheme (acid etching with 15.0 wt.% HNO3 solution for 15 min impregnation) was proposed. Therein, the optimal monolithic catalyst could achieve the loading efficiency of 42.4% and toluene degradation efficiencies of 76.2%. The mechanism for the stable loading of TiO2 was revealed by experiment and DFT calculation. The high surface roughness of metal substrate and the strong chemisorption between TiO2 and TiCl4 accounted for the high loading efficiency and photocatalytic activity. This work provides the pioneering exploration for the practical application of TiO2 catalysts loaded on the surface of metal substrate for VOCs removal, which is of significance for the large-scaled application of photocatalytic technology.

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“…Several types of macro-mesoporous carbon materials with good floatability have already been studied and used to improve the photocatalytic activity of the catalyst. These materials include expanded graphite, spongy graphite materials and magnetically separated porous carbon materials [17][18][19]. However, these materials have multiple disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of floating porous graphite carbon monoliths produced from biomass and its application

Chen

Zhang

et al. 2020

E3S Web Conf.

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Herein, a new floating porous graphite carbon monolith (FCM) was prepared using the graphite powder and peanut shells as the carbon skeleton and using FAC and sepiolite as the swelling agent. The multi-hierarchical porous FCMs were obtained by two-step acid activation method. The effects of the addition of biomass and phosphoric acid on the physical properties and pore structure of the prepared material were investigated. The FCM was combined with codoped titania to develop a new floating photocatalysts. The results showed an increase in the amount of biomass materials during FCM preparation increased the ratio of mesoporous structure in the products. In addition, a high micropore volume ratio and the strongest adsorption effect were achieved by optimizing the phosphoric acid impregnation ratio. After process optimization, the densities of the prepared FCMs ranged between 0.75 and 0.89 g/cm3, and the specific surface area and diameter range of the large pores of the material were 104.5 m2/g and 3-50 μm, respectively. Moreover, the new floating catalysts displayed the excellent photocatalytic properties and recyclability performance.

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Shaping powdered active carbons into monoliths without decreasing mesoporosity by using silica sol as binder

Cited by 6 publications

References 12 publications

Formation and Performance of Monolithic Catalysts for Selective Catalytic Reduction of Nitrogen Oxides: A Critical Review

Formation and Performance of Monolithic Catalysts for Selective Catalytic Reduction of Nitrogen Oxides: A Critical Review

Stable Loading of TiO2 Catalysts on the Surface of Metal Substrate for Enhanced Photocatalytic Toluene Oxidation

Preparation and characterization of floating porous graphite carbon monoliths produced from biomass and its application

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